Carbureter.



A. A. STEWARD.

GARBURETER.

APPLICATION FILED JULYB, 1911. RENEWED DEO.18, 1912.

Patented July 15, 1913.

WiTf/ESSES -UNITED srars ALDEN AARON STEWARID,

or autumn, vEnfMoNr.

CARIBURETER.

Specification'o't Letters Patent.

Patented July 15, 1913.

Application filed July 6, 1911, Serial No. 637,122. Renewed December 18, 1912. Serial No. 737,571.

To all whom it may concern:

Be it known that I, ALDEN A. STEWA-BD, a citizen of the United States, residing at Rutland, county of Rutland, State of Vermont, have invented certain new and useful Improvements in Carburetors, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvementsin carbureters and more particularly'to carbureters used in connection with gasengines upon automobiles, the object being to" provide means for controlling the supply of fuel when the engine is running at diiferent speeds by increasing or decreasing the area of the atomizing chamber in order to increase or decrease the velocityof air passing the spray nozzle whereby the roper amount of liquid fuel will be sucked therefrom, by the aspirating effect of the air through the passage past .the spray nozzle;

Another object of the invention is to provide a novel form of-valve for increasing or decreasing the size of the passage adjacent the. spray nozzle which is operated simultaneously with the throttle valve whereby theengine can be run slower and more consta'nt'l without-stopping or at any other interme' iate speed than is possible with carbureters now in use.

A further object of the invention is to provide the valve for controlling the air into the carbureting chamber which is com posed of oppositely disposed members adapt- 1 ed tobe forced-toward each, other simultaneously whereby the size of the passage: will be decreased attire-center thereof ad jacefitrtlie spray nozzlinoi'der to allow the velocityp'fair to be increased in order to:

[suck the required'amount of hydrocarbon;

; a high and the novel features thereof defined by similar view with the side of the casing i ethe appended claims.

In the drawingsFigure 1 is a side elevation of a carbureter detached; Fig. '2 is a moved in order to show the construction of the interior; Fig. 3 is a vertical section; Fig. 4; is a view similar to that of Fig. 3 showing the valve partly closed in order to de- 0 crease the area for increasing the velocity of 'alr being sucked into the en ne; and

Fig. 5 is a detail view of the modified form of spray nozzle.

Like numerals ofreference refer to like 5 parts inft he m'qveral'ltguies of the drawings.

In the drawings, 9 1 i'indicates an engine cylinder which di ided with the usual inlet pipe 2 to whlch is connected a casing 3 forming the carbureti'ng dhagmber of the carbureter which is rovide'd with an open end into which exten s a feed .pi e ft having a centrally arranged spray nozz e 5 and as herein shown sa d nozzi'eis pointed for a purpose later described. The feed pipe 4 is connected to a reservoir 6 adapted. to contain liquid hydrocarbon which -is of the ordinary construction of reservoir now inuse and 1s provided with :a needle valve 7 for eontrolling the flow o'f oilth'iough the feed 30 pipe and is provided with a supply nipple 8 controlled b a va-l've'9, said nipple being adapted to e connected to the pipe from any suitable source of supply.

The upper end of the casing 3 is con- 35 the usual form of operating means, not

shown. Fixed on the valve stem 12 are diverging arms 14 carrying a cam 15 which, is-secured in its adjusted position thereon byscreWs 16, saidcam being adapted to engage a stud pin 17 working through a slot es ormedjin the faoe of the casing, said slot being closed by a washer; 18 mounted upon the stud pin and held tightlg against the face plate of the ca'si'ng in or er to form a tight joint by a spring 19 and, as herein-rec shown, is substantially U-shaped in order to form a guide for the stud as the same is moved.

My improved valve for accomplishing the desired result comprises a 'pai '1',;of flat 20 and 21,.t e lower ends'of which are secured to the respective walls of the casi-Iigby blocks 22 and the upper ends are secured 'to the side bars 23 of a frame 24 which isslidably mounted therein andon 11:;

which the studpin 17 is mounted. It will seen that as the frame is forced down- \vardly by the cam, the springs will be bowed toward each otle? in order to tie crease the area of: the carbureting chamber which will increase the velocity of the air passing into the open end of the easinf thereby regulating the amount of oil being sucked out of the spray nozzle by the aspi rating eii ect. In the form herein shown, the casing is rectangular in shape but itis, of course, understood that the same can be made in any shape desired and the spring members constructed to conform to the shape. By this construction, the springs are forced inwardly in such a manner that the intake of air to each sir of the nozzle and the passage of the atomized hydrocarbon will have a clear passage which is unobstructed by any lateral projection, the springs bowing on curved lines to allow the contraction of the size of opening to be formed in such a manner that. a. great ad-- vantage is ob ained over previously cond valves. It will be seen that by .ng the spray nozzle pointed, the splin s can be forced toward each other to such an extent thatithe opening can be practically closed, thereby increasing the velocity of the air to such an extent that the desired amountof liquid hydrocarbon will bedrawn out of the spray nozzle and atomized to obtaimthe best possible mixture. By mounting the valve in this manner and operating the same by a cam from the val e stem of the throttle valve, the area will be increased or decreased as the throttle valve is opened or closed in order to give the correctvelocity of air for the opening of the throttle or such velocity of air for the opening of the throttle that it will give the best. mixture and as shown in Fi 5, the valve is practically closed, when the throttle valve is in the same position.

lVhile I hav shown and described a pan ticuler form of throttle valve, it is, of course, understood that any form of throttle valve can be employed and that other means than that herein shown and described for operating the valve for increasing or decreasing the velocity of air whereby the air inlet passage way into and through the carbureting chamber will be controlled by the throttle valve. I have also found that, under certain conditions, better results can be obtained by providing a multiple jet spray nozzle as, shown in 5 which will allow the jets to be reduced in size to su h an extent that the air inlet passage way can he iflccreesed in area to a greater extent 1Z increasing the velocity of the air past the rest appreciate the advantages 0 a wi .h e single jet nozzle, thereb 1 be seen that l have provided ine-v producing a high velocity of. an: post sPra) nozzle at all times and under all conorder to allow the engine to be run any speed desired without wasting any fuel at the same time the operator has perfect control of the engine whereby the ame vmay be thrown from a high to a low speed by simply operating the throttle valve which simultaneously controls the air inlet passage way.

From the foregoing description, it is thoughtthat the opera ion of the carburetor can be clearly understoo allow those not skilled in th stained, t lowing description the operathm same is given; air is sucked casing thi 'qh the air inlet passage the engine; liquid hydrocarbon is dra. of the spray nozzle and atomized in the earbureting chai'nber from wl 'ch it s drai n o the cylinr er of the engine in t" e ordinary manner. llereiotore, great d'liiculties have con encountered with caioureters when the speed of the engine as'no means was provided for reducing the supply or" a thereby ruiking it impossible to-main i. n at all limes a proper pro portion liquid h alrocarbon and air By nodding the valve for reducing the area in order to increase the vehcily of air a the point of the spray nozzle, these oiliicub ties are m erconie and a carburetor is formed which will allow the engine to be un slower and more constantly without st! mg.

Having described my invention and set iorth meriw, what 1 claim and desire to secure my Letters Patent is 1. In a carlmreter, the combination with a casing; boring a carhureting chamber and an air inlet passage, a teed pipe extending through the air inlet was" into the chamber and provided w l n spray nozzle, a valve for controllir d puss r of air tl'irough said passage, said. valve comprising a pair of oppositely disposed flat members of substantially the same width said passage adapted to be flexed tou'crd each other adjacent the spray nozzle.

A carburetor having :3. carburcting chamber provided with an air inlet passage, a spray nozzle, a valve for controlling said air passage, said valve comprising oppositely disposed spr ng members ha ing fixed and slidably mounted ends,-and means for reciprocating: said slidablj i'nounl'ed ends for flexing said spring members toward the spray nozzle.

A carbureter having a carbureting chamber provided with an air passage, a spray nozz e, flat springincinl: mounted in said passage having fixed and slidably we 5 reduced also eaa'sand-means for flex ng said spring members against said "s ray nozzle in order to decrease the areaoftiie air passage by reciprocating said slidably mounted ends.

4. In a carhureter, the combination with a casing having a carbureting chamber provided with an air inlet passage and anoutlet passage, a feed pipe having a spray nozzle extending into said air inlet passage, spring members for contracting the air passage, means for flexing said spring members, a throttle valve, and means carried by the throttle valve for actuating the flexing means.

5. A carburetor having a carburet-ing chamber provided with an air inlet passage, a spray nozzle arran ed centrally within said airinlet passage, spring members arranged within said air inlet passage, means for flexing said spring members to 'ard the spray nozzle, and means for controlling the outlet passage of said earbureting chamber.

6. A carburetor having a c'arbureting chamber provided with an air inlet passage, springgsecured at one end to the, walls of said pa age a frame slidablymounted in said passage to which the other ends of said springs are connected a, pin carried by said frame, and means engaging said pin for flexing said springs.

T. In a carburetor, the combination with a casing forming a carburet-ing chamber having an air inlet passage and an outlet passage, athrott-le valve for controlling the outlet passage, a. spray nozzle arranged within the air inlet passage, springs having their upper ends connected to said casing within said passage, a frame to which the lower ends of said springs are connected, a pin carried by said frame extendin thfough said casing, and a cam carrie by the throttle valve engaging said pin forsimultaneously flexing said springs toward the spray nozzle when the throttle valve is partly closed.

8. A carbureter comprising a casing having a contracted outlet at its upper end and an air inlet passage at its lower end forming a central carbureting chamber, a throttle valve mounted in said contracted outlet. passage having a valve stem extending outwardly therefrom, a feed pipe ex-' tending into said air inlet passage having 1 pointed spray nozzle at its end, springs arranged within said air inlet passage having fixed and movable ends, and means carried by the throttle valve stem for actuating said springs to flex the springs against the spray nozzle.

9. A. carhureter comprising a casing having a carbureting chamber provided with an air inlet passage and an outlet passage, throttle valve for controlling the outlet passage, oppositely disposed spring members for controlling the inlet passage, means for lends secured to said casin flexing said spring members toward the center of said passage, said means being actuateid by the throttle valve.

0. In a carburetor, the combination with a casing having a carbin'eting chamber provided with an air inlet passage and an outlet passage, a throttle valve for controlling the outlet passage having a stem extending outwardly from said casing, arms carried by said valve stem, a cam carried by said arms, springs arranged within said air inlet passage having fixed and movable ends, and a member carried by the movable ends of said springs adapted to be engaged by said cam for flexing said springs.

11. A carbureter comprising acasing having a carbureting chamber provided with an air inlet passage and an outlet passage, said casing being provided with a slot, a movable frame mounted in the aig inlet passage having a pin extending through said slot, springs fixed to said. movable frame having their opposite ends fixed to said casing, a throttle valve, and a cam carried by the throttle valve engaging said pin;

12. A. carbureter comprising a casing having a carbureting chamber provided with an air inlet passage and an outlet passage, a throttle valve for controlling the outlet passage, a cam carried by said throttle valve, a movable frame mounted within said air inlet passage, sprin having their lower ends fixed to said rame and their upper a spray nozzle arranged between sald springs, a in carried by said frame working through a slot formed in saidcasin'g, a washer arranged on said pin over said slot, a spring for holding said washer against said casing, said spring forming a guide for said pin, said pin being adapted to be engaged by said cam so as to expand said springs.

13. A carburetor having a carbureting chamber provided with an air inlet passage, a valve for closing said air inlet-passage formed of oppositely disposed springs, having fixed and movable ends, means for flexing said springs, said means being actuated simultaneously with the closing of the throttle valve.

14:. A carbureter having a carbureting chamber provided with an air inlet passage and an outlet passa e, one wall of said carbureting chamber eing provided with a slot, a frame slidabl mounted in said casing having a pin exten' ing through said slot, a washer arranged on said pin over; said. slot, a U-shaped spring bearin against saidwasher and forming a gui e for said pin,

spring members carried by said frame havpin.

15. A carbureter having acarbureting a so Loezeee arms oo-acting With said pin, and a spray 1 nozzle a 'ranged Withih the carburetor be- 10 tween sald spring members.

In testimony whereof I afix my signature in presence of two witnesses.

ALDEN AARON STEWARD.

Witnesses:

CHAS. L. HOWE, W. E. ARMBLo.

Copies of this patent may be obtaiiied for five dents each, by addressing the Commissioner of Eatents, Washington, D. G.

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